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Full text of "Handbook Of Chemical Engineering - I"

272
CHEMICAL ENGINEERING
raising of the rakes is done by cams which move the bell cranks on which the rakes are suspended through a certain arc at each revolution and hold the rakes above the settled bed on the return portion of the stroke.
The Akins machine as shown in Pig. 7 is a semi-circular tank on which is mounted a shaft supporting a spiral.    The central portion of the spiral is all open except for
FIG. 7.—Akins classifier.
the spaces occupied by the arms which secure it to the shaft. The spiral is also broken at numerous points to permit of the draining back of slime and water in the upper portion of the classifier where the settled material has been wormed up above the ower or pool portion of the machine.
GENERAL DIMENSIONS or AKINS CLASSIFIER
Size															
inches	A		B		C		F		0		H		J		K
16	75		8%		60		20		12		42		12		27
24	126		10%		108		32		24		66		24		46
30	144		10%		126		36		30		72		30		48
36	168		14%		150		40		30		96		30		66
45	182		12%		162		52		30		108		30		72
54	197		16%		174		61		42		96		42		81
60	221		16%		198		76		48		108		48		93
															
Size															
inches,		L	M	N		0		P		Q		R		X	
16		18	16	3H		$1A		2		9M				2 by 4	
24		27	24	8		12M		3H		15H		13K		6 by 8	
30		33	30	9		14		&A		19H		16K		6 by 8	
36		39	36	12		17		31A		22^		19M		8 by 10	
45		48	45	12		20		3H		27		24M		8 by 10	
54		57	54	13		25		5^		31K		30		8 by 12	
60		63	60	11		25		5		33H		34		8 by 12	
The above is intended to supply the data necessary for including these classifiers in drawings.    Dimensions D and E will vary according to inclination of the classifier.